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Ubuntu 23.04, 22.04 LTS, 20.04 LTS Security Advisory: Mosquitto DoS

Several security issues were fixed in Mosquitto.. ========================================================================== Ubuntu Security Notice USN-6492-1 November 21, 2023 mosquitto vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.04 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS (Available with Ubuntu Pro) Summary: Several security issues were fixed in Mosquitto. Software Description: - mosquitto: MQTT version 3.1/3.1.1 compatible message broker Details: Kathrin Kleinhammer discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system were provided with a specially crafted input, a remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-34431) Zhanxiang Song discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system were provided with a specially crafted input, a remote attacker could possibly use this issue to cause an authorisation bypass. This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2021-34434) Zhanxiang Song, Bin Yuan, DeQing Zou, and Hai Jin discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system were provided with a specially crafted input, a remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2021-41039) Zhengjie Du discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system were provided with a specially crafted input file, a remote attacker could possibly use this issue to cause a denial of service. (CVE-2023-0809) It was discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system were provided with a specially crafted input, a remote attacker could possibly use thisissue to cause a denial of service. (CVE-2023-3592) Mischa Bachmann discovered that Mosquitto incorrectly handled certain inputs. If a user or an automated system were provided with a specially crafted input, a remote attacker could possibly use this issue to cause a denial of service. This issue was only fixed in Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2023-28366) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 23.04: mosquitto 2.0.11-1.2ubuntu0.1 Ubuntu 22.04 LTS: mosquitto 2.0.11-1ubuntu1.1 Ubuntu 20.04 LTS (Available with Ubuntu Pro): mosquitto 1.6.9-1ubuntu0.1~esm1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-6492-1 CVE-2021-34431, CVE-2021-34434, CVE-2021-41039, CVE-2023-0809, CVE-2023-28366, CVE-2023-3592 Package Information: https://launchpad.net/ubuntu/+source/mosquitto/2.0.11-1.2ubuntu0.1 https://launchpad.net/ubuntu/+source/mosquitto/2.0.11-1ubuntu1.1 . Uncover significant Mosquitto flaws impacting various Ubuntu versions and find out how to fortify your setup immediately.. Mosquitto Security, Ubuntu Issues, Denial of Service. . Severity: Critical. LinuxSecurity.com Team

Nov 21, 2023 •Critical Ubuntu